Travel conditions are deteriorating across the Intermountain West as winter storm warnings and advisories take effect. The northern Rockies, including parts of Idaho, Montana, Washington, and Colorado, are bracing for significant snowfall and strong winds through Saturday, December 6, 2025. Mountain regions are expected to receive between 6 and 24 inches of snow, creating difficult and potentially impossible travel conditions in higher terrain. Strong winds will further reduce visibility, exacerbating the hazardous conditions.